20 (月)	00:42	04:30	10:21	18:25
	87cm	81cm	105cm	21cm
長潮 出 06:21 入 17:24 出 12:35 入 02:09

那珂湊（茨城）2051年02月20日の10分毎の潮の高低差を確認できます。
また1日の潮の高低差が1番大きい（潮の流れが大きい）時間に「最大潮位差」と明記してます。

時刻	潮位	高低差	各ポイント
2/20 00:00	86.0	↑0.4
2/20 00:10	86.4	↑0.4
2/20 00:20	86.6	↑0.2
2/20 00:30	86.8	↑0.2
2/20 00:40	86.8	0	満潮
2/20 00:50	86.8	0
2/20 01:00	86.7	↓-0.1
2/20 01:10	86.5	↓-0.2
2/20 01:20	86.3	↓-0.2
2/20 01:30	86.0	↓-0.3
2/20 01:40	85.7	↓-0.3
2/20 01:50	85.3	↓-0.4
2/20 02:00	85.0	↓-0.3
2/20 02:10	84.6	↓-0.4
2/20 02:20	84.2	↓-0.4
2/20 02:30	83.8	↓-0.4
2/20 02:40	83.4	↓-0.4
2/20 02:50	83.0	↓-0.4
2/20 03:00	82.6	↓-0.4
2/20 03:10	82.3	↓-0.3
2/20 03:20	81.9	↓-0.4
2/20 03:30	81.6	↓-0.3
2/20 03:40	81.4	↓-0.2
2/20 03:50	81.1	↓-0.3
2/20 04:00	81.0	↓-0.1
2/20 04:10	80.8	↓-0.2
2/20 04:20	80.8	0	干潮
2/20 04:30	80.7	↓-0.1	干潮
2/20 04:40	80.8	↑0.1
2/20 04:50	80.9	↑0.1
2/20 05:00	81.0	↑0.1
2/20 05:10	81.3	↑0.3
2/20 05:20	81.6	↑0.3
2/20 05:30	81.9	↑0.3
2/20 05:40	82.3	↑0.4
2/20 05:50	82.9	↑0.6
2/20 06:00	83.4	↑0.5
2/20 06:10	84.1	↑0.7
2/20 06:20	84.8	↑0.7
2/20 06:30	85.5	↑0.7
2/20 06:40	86.4	↑0.9
2/20 06:50	87.3	↑0.9
2/20 07:00	88.2	↑0.9
2/20 07:10	89.2	↑1.0
2/20 07:20	90.2	↑1.0
2/20 07:30	91.3	↑1.1
2/20 07:40	92.4	↑1.1
2/20 07:50	93.5	↑1.1
2/20 08:00	94.6	↑1.1
2/20 08:10	95.8	↑1.2
2/20 08:20	96.9	↑1.1
2/20 08:30	97.9	↑1.0
2/20 08:40	99.0	↑1.1
2/20 08:50	100.0	↑1.0
2/20 09:00	100.9	↑0.9
2/20 09:10	101.8	↑0.9
2/20 09:20	102.5	↑0.7
2/20 09:30	103.2	↑0.7
2/20 09:40	103.8	↑0.6
2/20 09:50	104.3	↑0.5
2/20 10:00	104.6	↑0.3
2/20 10:10	104.8	↑0.2
2/20 10:20	104.9	↑0.1	満潮
2/20 10:30	104.8	↓-0.1
2/20 10:40	104.6	↓-0.2
2/20 10:50	104.2	↓-0.4
2/20 11:00	103.6	↓-0.6
2/20 11:10	102.9	↓-0.7
2/20 11:20	102.1	↓-0.8
2/20 11:30	101.0	↓-1.1
2/20 11:40	99.8	↓-1.2
2/20 11:50	98.5	↓-1.3
2/20 12:00	97.0	↓-1.5
2/20 12:10	95.3	↓-1.7
2/20 12:20	93.5	↓-1.8
2/20 12:30	91.6	↓-1.9
2/20 12:40	89.5	↓-2.1
2/20 12:50	87.4	↓-2.1
2/20 13:00	85.1	↓-2.3
2/20 13:10	82.7	↓-2.4
2/20 13:20	80.2	↓-2.5
2/20 13:30	77.7	↓-2.5
2/20 13:40	75.1	↓-2.6
2/20 13:50	72.4	↓-2.7
2/20 14:00	69.7	↓-2.7
2/20 14:10	67.0	↓-2.7
2/20 14:20	64.3	↓-2.7
2/20 14:30	61.5	↓-2.8	最大潮位差
2/20 14:40	58.7	↓-2.8	最大潮位差
2/20 14:50	56.0	↓-2.7
2/20 15:00	53.3	↓-2.7
2/20 15:10	50.6	↓-2.7
2/20 15:20	48.0	↓-2.6
2/20 15:30	45.5	↓-2.5
2/20 15:40	43.0	↓-2.5
2/20 15:50	40.6	↓-2.4
2/20 16:00	38.3	↓-2.3
2/20 16:10	36.0	↓-2.3
2/20 16:20	33.9	↓-2.1
2/20 16:30	32.0	↓-1.9
2/20 16:40	30.1	↓-1.9
2/20 16:50	28.4	↓-1.7
2/20 17:00	26.8	↓-1.6
2/20 17:10	25.4	↓-1.4
2/20 17:20	24.2	↓-1.2
2/20 17:30	23.1	↓-1.1
2/20 17:40	22.2	↓-0.9
2/20 17:50	21.4	↓-0.8
2/20 18:00	20.9	↓-0.5
2/20 18:10	20.5	↓-0.4
2/20 18:20	20.3	↓-0.2	干潮
2/20 18:30	20.4	↑0.1
2/20 18:40	20.6	↑0.2
2/20 18:50	21.0	↑0.4
2/20 19:00	21.6	↑0.6
2/20 19:10	22.3	↑0.7
2/20 19:20	23.3	↑1.0
2/20 19:30	24.5	↑1.2
2/20 19:40	25.8	↑1.3
2/20 19:50	27.3	↑1.5
2/20 20:00	28.9	↑1.6
2/20 20:10	30.7	↑1.8
2/20 20:20	32.7	↑2.0
2/20 20:30	34.7	↑2.0
2/20 20:40	36.9	↑2.2
2/20 20:50	39.2	↑2.3
2/20 21:00	41.6	↑2.4
2/20 21:10	44.0	↑2.4
2/20 21:20	46.5	↑2.5
2/20 21:30	49.0	↑2.5
2/20 21:40	51.6	↑2.6
2/20 21:50	54.2	↑2.6
2/20 22:00	56.8	↑2.6
2/20 22:10	59.4	↑2.6
2/20 22:20	61.9	↑2.5
2/20 22:30	64.4	↑2.5
2/20 22:40	66.9	↑2.5
2/20 22:50	69.3	↑2.4
2/20 23:00	71.6	↑2.3
2/20 23:10	73.8	↑2.2
2/20 23:20	75.9	↑2.1
2/20 23:30	77.9	↑2.0
2/20 23:40	79.8	↑1.9
2/20 23:50	81.5	↑1.7